x trends backend first ver

pages/xtrends.tsx

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+import { GetStaticProps } from "next";
+import { getXTrends, GetXTrendsData } from "prisma/queries/getXTrends";
+
+const tiers = [
+  {
+    label: "X",
+    criteria: 6,
+    color: "purple.700",
+  },
+  {
+    label: "S+",
+    criteria: 5,
+    color: "red.700",
+  },
+  {
+    label: "S",
+    criteria: 4,
+    color: "red.700",
+  },
+  {
+    label: "A+",
+    criteria: 3,
+    color: "orange.700",
+  },
+  {
+    label: "A",
+    criteria: 2,
+    color: "orange.700",
+  },
+  {
+    label: "B+",
+    criteria: 1.5,
+    color: "yellow.700",
+  },
+  {
+    label: "B",
+    criteria: 1,
+    color: "yellow.700",
+  },
+  {
+    label: "C+",
+    criteria: 0.5,
+    color: "green.700",
+  },
+  {
+    label: "C",
+    criteria: 0.002, //1 in 500
+    color: "green.700",
+  },
+] as const;
+
+interface Props {
+  trends: GetXTrendsData;
+}
+
+const XTrendsPage: React.FC<Props> = ({ trends }) => {
+  console.log({ trends });
+  return <>asd</>;
+};
+
+export const getStaticProps: GetStaticProps<Props> = async () => {
+  const trends = await getXTrends();
+
+  return { props: { trends } };
+};
+
+export default XTrendsPage;

prisma/queries/getXTrends.ts

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+import { Prisma } from "@prisma/client";
+import prisma from "prisma/client";
+
+export type GetXTrendsData = Prisma.PromiseReturnType<typeof getXTrends>;
+
+export const getXTrends = async () => {
+  const placements = await prisma.xRankPlacement.findMany({
+    select: { mode: true, month: true, year: true, weapon: true, xPower: true },
+  });
+
+  const result: {
+    [year: string]: {
+      [month: string]: {
+        [weapon: string]: {
+          SZ?: { xPowerAverage: number; count: number };
+          TC?: { xPowerAverage: number; count: number };
+          RM?: { xPowerAverage: number; count: number };
+          CB?: { xPowerAverage: number; count: number };
+        };
+      };
+    };
+  } = {};
+
+  placements.forEach((placement) => {
+    if (!result[placement.year]) result[placement.year] = {};
+    if (!result[placement.year][placement.month]) {
+      result[placement.year][placement.month] = {};
+    }
+    if (!result[placement.year][placement.month][placement.weapon]) {
+      result[placement.year][placement.month][placement.weapon] = {};
+    }
+
+    const weaponObj = result[placement.year][placement.month][placement.weapon][
+      placement.mode
+    ] ?? { xPowerAverage: 0, count: 0 };
+
+    const previousAverage = weaponObj.xPowerAverage;
+    const previousCount = weaponObj.count;
+
+    weaponObj.xPowerAverage =
+      (previousAverage * previousCount + placement.xPower) /
+      (previousCount + 1);
+    weaponObj.count++;
+
+    result[placement.year][placement.month][placement.weapon][
+      placement.mode
+    ] = weaponObj;
+  });
+
+  return result;
+};